I recently came across this video of a group of Thai monks chanting in a pseudo-melodic way, and I was immediately intrigued:

Could you help me answer any of the following questions:
1. What sutta are they chanting? (The transliterated name in the title doesn't help very much)
2. Is this style of pseudo-melodic chant common? Does it have a name?
3. Where/when would you hear monks chanting like this? Is it associated with certain temples?